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节点连接形式对轻型门式刚架滞回性能影响研究

DOI: 10.13197/j.eeev.2015.04.179.wangzs.021, PP. 179-189

Keywords: 门式刚架,滞回性能,节点形式,端板连接

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Abstract:

本文针对端板竖放、平放和斜放柱脚铰接1/2榀1/2缩尺变截面门式刚架进行滞回性能研究,每种连接形式3个试件。试验对比分析了不同端板连接的破坏形式、P-Δ滞回曲线、骨架曲线、刚度退化情况以及螺栓的内力分布规律。研究结果表明3种连接形式的门式刚架塑性变形能力较差,耗能能力较低;端板越厚、螺栓等级越高、数量越多的节点刚度越大,但后期刚度退化越严重。端板竖放与平放连接接近刚性节点,斜放节点的变形能力优于其它两种形式,相应的刚架耗能能力也较好,但承载力较低;综合分析破坏模式、承载力和变形能力等,建议设计时优先选用端板竖放连接形式。

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